package org.niux.aims.common.util;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**
 * 这是个配置文件操作类，用来读取和设置ini配置文件
 * 
 * @author 由月
 * @version 2004-08-18
 */
public final class ConfigurationFile {
	/**
	 * 从ini配置文件中读取变量的值
	 * 
	 * @param file
	 *            配置文件的路径
	 * @param section
	 *            要获取的变量所在段名称
	 * @param variable
	 *            要获取的变量名称
	 * @param defaultValue
	 *            变量名称不存在时的默认值
	 * @return 变量的值
	 * @throws IOException
	 *             抛出文件操作可能出现的io异常
	 */
	public static String getProfileString(String file, String section,
			String variable, String defaultValue) throws IOException {
		String strLine, value = "";
		BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
		boolean isInSection = true;
		try {
			while ((strLine = bufferedReader.readLine()) != null) {
				strLine = strLine.trim();
				strLine = strLine.split("[;]")[0];
//				
//				Pattern p;
//				Matcher m;
//				p = Pattern.compile("file://[//s*.*//s*//]");
//				m = p.matcher((strLine));
//				if (m.matches()) {
//					p = Pattern.compile("file://[//s*" + section
//							+ "file://s*//]");
//					m = p.matcher(strLine);
//					if (m.matches()) {
//						isInSection = true;
//					} else {
//						isInSection = false;
//					}
//				}
				
				if (isInSection == true) {
					strLine = strLine.trim();
					String[] strArray = strLine.split("=");
					if (strArray.length == 1) {
						value = strArray[0].trim();
						if (value.equalsIgnoreCase(variable)) {
							value = "";
							return value;
						}
					} else if (strArray.length == 2) {
						value = strArray[0].trim();
						if (value.equalsIgnoreCase(variable)) {
							value = strArray[1].trim();
							return value;
						}
					} else if (strArray.length > 2) {
						value = strArray[0].trim();
						if (value.equalsIgnoreCase(variable)) {
							value = strLine.substring(strLine.indexOf("=") + 1)
									.trim();
							return value;
						}
					}
				}
			}
		} finally {
			bufferedReader.close();
		}
		return defaultValue;
	}

	/**
	 * 修改ini配置文件中变量的值
	 * 
	 * @param file
	 *            配置文件的路径
	 * @param section
	 *            要修改的变量所在段名称
	 * @param variable
	 *            要修改的变量名称
	 * @param value
	 *            变量的新值
	 * @throws IOException
	 *             抛出文件操作可能出现的io异常
	 */
	public static boolean setProfileString(String file, String section,
			String variable, String value) throws IOException {
		String fileContent, allLine, strLine, newLine, remarkStr = "";
		String getValue;
		BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
		boolean isInSection = true;
		fileContent = "";
		try {

			while ((allLine = bufferedReader.readLine()) != null) {
				allLine = allLine.trim();
				if (allLine.split("[;]").length > 1)
					remarkStr = ";" + allLine.split(";")[1];
				else
					remarkStr = "";
				strLine = allLine.split(";")[0];
//				Pattern p;
//				Matcher m;
//				p = Pattern.compile("file://[//s*.*//s*//]");
//				m = p.matcher((strLine));
//				if (m.matches()) {
//					p = Pattern.compile("file://[//s*" + section
//							+ "file://s*//]");
//					m = p.matcher(strLine);
//					if (m.matches()) {
//						isInSection = true;
//					} else {
//						isInSection = false;
//					}
//				}
				if (isInSection == true) {
					strLine = allLine.trim();
					String[] strArray = strLine.split("=");
					getValue = strArray[0].trim();
					if (getValue.equalsIgnoreCase(variable)) {
						newLine = getValue + " = " + value + " " + remarkStr;
						fileContent += newLine + "\r\n";

						while ((allLine = bufferedReader.readLine()) != null) {
							fileContent += allLine + "\r\n";
						}
						bufferedReader.close();
						BufferedWriter bufferedWriter = new BufferedWriter(
								new FileWriter(file, false));
						bufferedWriter.write(fileContent);
						bufferedWriter.flush();
						bufferedWriter.close();

						return true;
					}
				}
				fileContent += allLine + "\r\n";
			}
		} catch (IOException ex) {
			throw ex;
		} finally {
			bufferedReader.close();
		}
		return false;
	}

	/**
	 * 程序测试
	 */
	public static void main(String[] args) {
		// String value = Config.getProfileString("sysconfig.ini", "Option",
		// "OracleDB", "default");
		// System.out.println(value);
		try {
			System.out.println(ConfigurationFile.getProfileString("config.ini", "Version", "DataVersion", ""));
		} catch (IOException e) {
			System.out.println(e.toString());
		}

	}
}
